USED STEEL GRADES AND THEIR PROPERTIES:

  CK45 20MNV6 C53 42CRMO4
QUALITY normalized normalized normalized hardenend
CHEMICAL ANALYSIS
C % 0,40-0.46 0,16-0,22 0,50-0,57 0,38-0,45
Mn % 0,50-0,80 1,40-1,75 0,50-0,80 0,60-0,90
Si % 0,15-0,40 0,15-0,35 0,15-0,40 0,15-0,40
Cr % - - - 0,90-1,20
Mo % - - - 0,15-0,25
V % - 0,10-0,20 - -
S % max 0,030 0,035 0,030 0,030
P % max 0,030 0,035 0,030 0,030
MECHANICAL PROPERTIES
Yeld Strength        
Rp 0,2 N/mm² > 320 > 450 > 330 > 730
Tensile Strength        
Rm N/mm² 520-700 540-710 650-800 880-1150
Elongation        
Ad5 % > 15 > 16 > 15 > 12
Charpy Test        
KCU 20° C - > 40 J - > 25 J
KV - 20° C. - > 27 J   > 27 J
Weldability GOOD VERY GOOD GOOD SUFFICIENT


- CHROME PLATING PROPERTIES:
   - CHROME THICKNESS:
       15 my +/- 3 my up to 20 mm diam.
       25 my +/- 5 my over 20 mm diam.
   - SURFACE HARDNESS:
       850-1150 HV/100 gr.
   - ROUGHNESS:
       0,2 my Ra max - 2 my Rt max
   - COHESION:
       no cracks or breaking or detaching after thermic shock
       (warming up to 300 celsius degree and cooling in water)
   - POROSITY:
       Test according to UNI EN ISO 1456/1458
       Result valuation according to UNI EN ISO 4540 RATING 8 - 10
   - CORROSION RESISTANCE:
       Test in neutral salt spray according to ASTM B 117 - 100 hours.
       Results valuation according to ISO 4540 RATING 7 - 10

 - TOLERANCES:

    - DIAMETER: ISO f7
    - OVALITY: HALF of the tolerance ISO f7
    - STRAIGTHNESS: < 0,5/2000

- LENGTHS:
    - up to 18 mm diameter: 3 m. approx.
    - from 20 mm up to 24 mm diameter: 5 m. approx.
    - over 25 mm. diameter: 6 m. approx.

- PACKING:

    MELTED PLASTIC ENVELOPED - CARD BOARD TUBE - PAPER
    WOODEN CASES AT COST UPON REQUEST.

- CERTIFICATION:
 According to UNI EN ISO 10204:2004/3.1

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